import argparse
import enum
import os
import sys

import requests

Link = "https://paste.diath.net"
Endpoint = "https://paste.diath.net/api"
Result = enum.IntEnum(
    "Result",
    "Success InvalidData InvalidSyntax InvalidExpiration InvalidExposure InvalidToken Throttled",
)

ResultMessage = {}
ResultMessage[Result.Success] = "Paste added successfully."
ResultMessage[Result.InvalidData] = "Invalid form data supplied."
ResultMessage[Result.InvalidSyntax] = "Submitted syntax is not supported."
ResultMessage[Result.InvalidExpiration] = "Invalid expiration range specified."
ResultMessage[Result.InvalidExposure] = "Invalid exposure value specified."
ResultMessage[Result.InvalidToken] = "Invalid API token provided."
ResultMessage[Result.Throttled] = "You have been temporarily throttled by the system."


def main():
    parser = argparse.ArgumentParser(
        description="Upload a local file or stdin contents to {}.".format(Link)
    )
    parser.add_argument(
        "--notify", action="store_true", default=False, help="Display notification."
    )
    parser.add_argument(
        "--expiration", action="store", default=0, help="Set paste expiration."
    )
    parser.add_argument(
        "--exposure",
        default="private",
        choices=("public", "private"),
        help="Set paste exposure.",
    )
    parser.add_argument("--syntax", default="None", help="Set paste syntax.")
    parser.add_argument(
        "filepath", nargs="?", help="The path to the file that you want to upload."
    )

    group = parser.add_mutually_exclusive_group()
    group.add_argument(
        "--raw",
        action="store_true",
        default=False,
        help="Return a link to a raw version of the entry.",
    )
    group.add_argument(
        "--simple",
        action="store_true",
        default=False,
        help="Return a link to a simple version of the entry.",
    )

    args = parser.parse_args()

    if not os.environ.get("PASTE_D_TOKEN"):
        print(
            "This script requires an API token in the PASTE_D_TOKEN environment variable."
        )
        sys.exit(0)

    data = {}
    data["token"] = os.environ.get("PASTE_D_TOKEN")
    data["exposure"] = 0 if args.exposure == "public" else 1
    data["expiration"] = args.expiration
    data["syntax"] = args.syntax

    if args.filepath:
        try:
            with open(args.filepath) as handle:
                data["content"] = handle.read()
        except:
            print("{}: File doesn't exist.".format(sys.argv[0]))
            sys.exit(0)
    else:
        if not sys.stdin.isatty():
            data["content"] = sys.stdin.read()
        else:
            parser.print_help()
            sys.exit(0)

    request = requests.post(Endpoint, data=data)
    if request.status_code == requests.codes.ok:
        data = request.text.split(":")
        assert len(data) >= 2

        code = int(data[0])
        hash = data[1]

        if code == Result.Success:

            def get_link_suffix():
                if args.raw:
                    return "/raw"
                elif args.simple:
                    return "/simple"

                return ""

            link = "{}/{}{}".format(Link, hash, get_link_suffix())

            print("{}".format(ResultMessage.get(Result.Success)))
            print("Hash: {}".format(hash))
            print("Link: {}".format(link))

            os.system('echo "{}" | xclip -selection c'.format(link))
            os.system('echo "{}" | xclip'.format(link))

            if args.notify:
                os.system(
                    'notify-send -i emblem-default "Paste" "Paste has been added succesfully."'
                )
        else:
            print("Invalid return code returned by the endpoint.")
            print("#{}: {}".format(code, ResultMessage.get(code)))

            if args.notify:
                os.system(
                    'notify-send -i emblem-unreadable "Paste" "Invalid return code returned by the endpoint.\n{}"'.format(
                        ResultMessage.get(code)
                    )
                )
    else:
        print("Invalid status code returned by the endpoint.")
        print("#{}".format(request.status_code))

        if args.notify:
            os.system(
                'notify-send -i emblem-unreadable "Paste" "Invalid status code returned by the endpoint."'
            )


if __name__ == "__main__":
    main()